There are two means of controlling the growth.
1. Periodically shock the machine to destroy the cells of the mold and bacteria slime organisms by using harsh chemicals and flush them out of the machine. These are the basic shock cleaning treatment methods (tablets / packets) explained elsewhere on the site.
Since the growth will always come back, you need to time the period between shocks correctly.
If not you are contaminating the laundry when the growth explodes on you again.
2. Kill existing growth and then week-after-week control smells by contaminating the residue film to so it will be difficult if not impossible for the nasties to grow on it.
Method # 1 did not work for me at all.
I felt that I could come up with a laundry additive that would work with method #2 without damaging clothes, washers, plumbing or the environment.
The formula needed to be safe enough to be used regularly, but, effective enough to control the odor. I tried a number of materials and it has taken a while. But, I found a combination that worked well on my system. With my washing schedule I figured: If it works for me, it will work for anyone... so...
TechnoFresh® is the result!
Try TechnoFresh® ... it works.